The "equity" classification rules in the 2013 and 2015 rulebooks change what's considered an "unclassified" shooter.
Other than for a classifier match or a match you've designated as 'sanctioned', if a shooter doesn't have a classification when you register him for a match, he'll be registered using his highest other classification. This will not impact the shooters database. Because there's now only a single REV division, REV shooters aren't affected by equity.
A shooter who is using a 'derived' classification will have his classification flagged in orange on the registration screen for the match.
Equity classifications will not be flagged.
Match results will include an asterisk and an explanation (at the top of web results and at the bottom of the page for print/PDF results).